480 Scientific Intelligence. 



3. The Normal and Pathological Histology of the Mouth; 

 by Arthur Hopewell-Smith. Vol. I, Normal Histology. Pp. 

 xvii, 345, with 2 colored plates and 262 text figures. Philadel- 

 phia, 1918 (P. Blakiston's Son and Co.). — This is the first of the 

 two volumes of a second, revised and enlarged edition of the 

 author's "Histology and Patho-histology of the teeth and asso- 

 ciated parts." It describes the cellular formation and histo- 

 genesis of all the organs of the mouth, but has particular 

 reference to the structure and development of the teeth. The 

 subject is treated comprehensively, the dental structures found in 

 various mammals, reptiles and fishes being introduced for com- 

 parison. Debated questions concerning the functions of various 

 types of cells are discussed in an appendix. Both text and illus- 

 trations require the highest commendation. w. r. c. 



4. Helvetica Chimica Acta (Georg & Co., Basel, Geneva). — 

 The Swiss Chemical Society, founded some seventeen years ago, 

 has recently issued the first part (pp. 1-96) of a new periodical, 

 under the title given above ; it is to be devoted to pure chemistry 

 and to serve as the organ of the Society. The editorial commit- 

 tee consists of MM. Bosshard, Fichter, Guye, Pictet, Rupe and 

 Werner, all of Switzerland. The present plan is to issue 6 to 8 

 parts yearly, aggregating from 500 to 1000 pages ; the subscrip- 

 tion price is 25 francs per year. This undertaking is particu- 

 larly noteworthy in view of the difficult situation economically 

 occupied by Switzerland at the present time, and the disinter- 

 ested contributions which the country is so freely making in 

 behalf of suffering humanity. 



Obituary. 



William Earl Hidden, well known for his work in American 

 Mineralogy, died at his country home, Ocean Grove, N. J., on 

 June 12, 1918, at the age of sixty-five years. He was early 

 engaged as an artist, but his interest in minerals led to his spend- 

 ing many years in the search for rare specimens, particularly 

 those of commercial value found in the South. One of the 

 remarkable localities investigated by him was that in Alexander 

 County, N. C. ; from it came the emerald-green variety of 

 spodumene, used as a gem and which received the name Hid- 

 denite (1881). He also developed the deposit of rare minerals 

 at Burnett, Llano Co., Texas. The pages of this Journal contain 

 many notes and articles on minerals by him particularly from 

 1880 to 1905. 



Sir Alexander Pedler, F.R.S., died on May 13 at the age of 

 sixty-eight years. He was early an active investigator in chem- 

 istry and in 1873 was made professor of chemistry at Calcutta; 

 later he was prominent in the meteorological service and in other 

 official lines; since 1907 he had been honorary secretary of the 

 British Science Guild. 



